AT&T Definity 6211 Manual de Instruções descarregar pdf (Página 132)

Networking and connectivity

555-233-767132 Issue 4 May 2003

The ISDN-BRI Trunk circuit pack allows Communication Manager to support the

T interface and the S/T interface as defined by ISDN standards (ITU-T

recommendation I.411). The circuit pack provides eight ports to the network and

supports two B channels and one D channel.

The ISDN-BRI Trunk provides the following advantages:

■ Provides an inexpensive way to connect to ISDN services provided by the

network provider

■ Meets almost all ETSI Country protocol requirements

■ Supports essential (not supplementary) ISDN services

BRI trunks support public-network access outside the U.S. on point-to-midpoint

connections, with the restriction that Communication Manager must not be

configured in a passive bus arrangement with other BRI endpoints. ISDN-BRI

trunks can be used as inter-PBX tie lines using the QSIG peer protocol.

See Figure 4.

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AT&T Definity 6211 Manual de Instruções Página 132